Why is there a direction when Hall is used?

乱世煮酒论天下

Why is there a direction when Hall is used? [Copy link]

Why is the Hall used in current detection marked with an arrow? It means the direction of use, but the current to be detected is AC. Why do we need to distinguish the direction?

qwqwqw2088

In principle, the control effect is obvious or significant when the current direction is perpendicular to the magnetic field direction.

Because it is a magnetic material

beyond_笑谈

The attached is Honeywell's material on Hall effect sensors, which details the principle of the Hall effect and its application in circuits. For reference

吾妻思萌

No direction, do you know whether 1v voltage is positive 1a or negative 1a?

Gen_X

Generally, the direction of the excitation voltage is the same as the positive direction of the output, so you can judge whether the signal you get is the positive wave or the other half based on the phase. Even if you are measuring DC, you don’t want the output to be a negative voltage corresponding to the current relationship!